From 2a1fea4ce0b121eaa6c66dad5a29aac9a73d7541 Mon Sep 17 00:00:00 2001
From: wenxuanjun <41050170+wenxuanjun@users.noreply.github.com>
Date: Mon, 30 Mar 2026 08:43:47 +0800
Subject: [PATCH] vfmt: allow conditional selective imports (#26787)

---
 vlib/v/fmt/tests/conditional_import_expected.vv | 7 +++++++
 vlib/v/fmt/tests/conditional_import_input.vv    | 8 ++++++++
 vlib/v/parser/module.v                          | 2 +-
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 vlib/v/fmt/tests/conditional_import_expected.vv
 create mode 100644 vlib/v/fmt/tests/conditional_import_input.vv

diff --git a/vlib/v/fmt/tests/conditional_import_expected.vv b/vlib/v/fmt/tests/conditional_import_expected.vv
new file mode 100644
index 000000000..3fb33ee58
--- /dev/null
+++ b/vlib/v/fmt/tests/conditional_import_expected.vv
@@ -0,0 +1,7 @@
+module main
+
+$if linux {
+	import math { max }
+} $else $if windows {
+	import arrays { max }
+}
diff --git a/vlib/v/fmt/tests/conditional_import_input.vv b/vlib/v/fmt/tests/conditional_import_input.vv
new file mode 100644
index 000000000..746bf8b6d
--- /dev/null
+++ b/vlib/v/fmt/tests/conditional_import_input.vv
@@ -0,0 +1,8 @@
+module main
+
+$if linux {
+import math { max }
+} $else $if windows
+{
+import arrays { max }
+}
diff --git a/vlib/v/parser/module.v b/vlib/v/parser/module.v
index 8977b4757..dd667c97f 100644
--- a/vlib/v/parser/module.v
+++ b/vlib/v/parser/module.v
@@ -323,7 +323,7 @@ fn (mut p Parser) import_syms(mut parent ast.Import) {
 	for p.tok.kind == .name {
 		pos := p.tok.pos()
 		alias := p.check_name()
-		if p.is_imported_symbol(alias) {
+		if p.is_imported_symbol(alias) && !(p.pref.is_fmt && p.inside_ct_if_expr) {
 			p.error_with_pos('cannot register symbol `${alias}`, it was already imported',
 				pos)
 			return
-- 
2.39.5